Hi there,
I seem to have stumbled upon a possible solution to the login problems.
I started using gamebooster a few days ago to increase my fps in games. When I used it in crysis 2, i realized i was able to login finally. My only guess is that gamebooster disabled something that was clashing with my logging in. I used it on my friends pc as well and he too was able to login after that.
Well this solution may or may not work for you but you can give it a go.
Here's the link

http://www.iobit.com/gamebooster.html

Cheers!!

can someone confirm because my WOT (web of trust) says its a spamming website and copies malwarebytes which is a malware cleaner so i do not now how a problem like this can help because fps has absolutely nothing to do with network. if this is spam i have one thing to say "gaining from other peoples problems is human, however taking a sh!t is also human but we do not give that to other people"

Wow, did you even read what I wrote?? I very clearly said that this is a POSSIBLE solution. And by the way 'Gamebooster also disables a lot of network stuff that may have been clashing with the login. Oh and by the way neither am I spammer nor is the website.
Cheers!!